Table 1. Parameter estimates (with 95% confidence interval) of linear regressions (on the log-scale) linking the species-specific metrics obtained in zoo and free-ranging populations.
Longevity | Baseline mortality | Onset of senescence | Rate of senescence | |||||
---|---|---|---|---|---|---|---|---|
slope | intercept | slope | intercept | slope | intercept | slope | intercept | |
Males | 53 species | 51 species | 51 species | 45 species | ||||
0.330 (0.191; 0.469) | 6.432 (4.461; 8.403) | −0.010 (−0.053; 0.033) | 0.143 (0.113; 0.174) | 0.538 (0.330; 0.746) | 2.200 (1.122; 3.279) | 0.186 (0.001; 0.372) | 0.113 (0.092; 0.135) | |
Females | 58 species | 56 species | 56 species | 48 species | ||||
0.351 (0.246; 0.456) | 6.621 (4.410; 8.833) | −0.010 (−0.080; 0.061) | 0.115 (0.102; 0.128) | 0.327 (0.123; 0.532) | 2.413 (0.878; 3.947) | 0.005 (−0.178; 0.188) | 0.073 (0.055; 0.091) |
Estimates were obtained from Linear Models when the phylogenetic signal λ was statistically not different from zero (i.e. for longevity, age at the onset of senescence and rate of senescence) and from Phylogenetic Generalized Least-Squares models when λ statistically differed from zero (for baseline mortality).